diffraction

Definition of diffraction

: a modification which light undergoes especially in passing by the edges of opaque bodies or through narrow openings and in which the rays appear to be deflected; also: a similar modification of other waves (as sound waves) or of moving particles (as electrons)

Medical Dictionary

diffraction

Medical Definition of diffraction

: a modification which light undergoes in passing by the edges of opaque bodies or through narrow slits or in being reflected from ruled surfaces and in which the rays appear to be deflected and to produce fringes of parallel light and dark or colored bands; also: a similar modification of other waves (as sound waves)